The air conditioner system in your car is made up of a compressor, condenser,
evaporator, expansion valve or orifice tube, receiver dry or accumulator, high
and low side hose, climate controller, fuse, relay and a switch plus some wiring
and connectors. I have made up this guide for you as I would look at a system
that was not working.
To help you know what I'm talking about throughout the
following information it would be good for you to look over how the system works
before we begin.
Now that you have reviewed the system, there are basically two sides, the air
delivery and the refrigerant recirculation portion of the system which includes the items
mentioned above. If the air is blowing from the vents but it's not cold this is
where we will start, if no air is coming out of the vents begin
further down in this article.
Suggested Tools and Supplies Needed
Air Conditioner Recharge Kit
A/C gauge set
If any of these supplies are needed they are not to expensive and are
available at Amazon or the local parts store. Begin by parking your car on level ground with the emergency brake set, engine
cool, wearing safety eyewear and gloves.
There are two methods a compressor can control the refrigerant
flow, the first is clutch cycling, this clutch is located on the front of the
compressor and easily seen. When the system is turned on this clutch will engage
which causes the refrigerant to start flowing throughout the system.
clutch cycles on and the off within a short amount of time the system is simply
low and needs to be recharged.
The second style of compressor is designed with an internal valve which
controls the refrigerant flow, you cannot visually see if the valve working. The best
place to start in both of these situations is to plug a a/c gauge set or
recharge kit to check the level of refrigerant present in the system.
If the charge is okay the next place I would check is the fuse which protects
the system, this fuse is located in the fuse panel or power distribution center.
By using your owners manual located the fuse and check it, if it's blown replace
it with a new one.
If in blows again once it's been replaced there is a short in the system, most of the
time this short can be related to the compressor in which case it needs to be